“SpecobjID”的版本间差异
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无编辑摘要 |
无编辑摘要 |
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| （未显示同一用户的2个中间版本） | |||
| 第1行： | 第1行： | ||
*DR7 |
*DR7 and before |
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Bits Length (# of bits) Mask Assignment Description |
:Bits Length (# of bits) Mask Assignment Description |
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:0-15 16 0xFFFF000000000000 plate number of spectroscopic plate |
:0-15 16 0xFFFF000000000000 plate number of spectroscopic plate |
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:16-31 16 0x0000FFFF00000000 MJD MJD (date) plate was observed |
:16-31 16 0x0000FFFF00000000 MJD MJD (date) plate was observed |
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| 第14行： | 第14行： | ||
:10-23 rerun (14 bits) |
:10-23 rerun (14 bits) |
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:0-9 line/redshift/index: 0 for SpecObj, else number of spectroscopic line (SpecLine) or index (SpecLineIndex) (10 bits) |
:0-9 line/redshift/index: 0 for SpecObj, else number of spectroscopic line (SpecLine) or index (SpecLineIndex) (10 bits) |
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:SpecobjID和plate,mjd,fiberID的互转参考[[sdssidl][中的程序[http://202.127.29.3/~shen/wiki/index.php/Sdssidl#SDSS.E4.B8.AD.E7.9A.84.E5.9F.BA.E7.A1.80.E7.A8.8B.E5.BA.8F] |
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2015年6月25日 (四) 04:24的最新版本
- DR7 and before
- Bits Length (# of bits) Mask Assignment Description
- 0-15 16 0xFFFF000000000000 plate number of spectroscopic plate
- 16-31 16 0x0000FFFF00000000 MJD MJD (date) plate was observed
- 32-41 10 0x00000000FFC00000 fiberID number of spectroscopic fiber on plate (1-640)
- 42-47 6 0x00000000003F0000 type type of targeted object
- 48-63 16 0x000000000000FFFF line/redshift/index 0 for SpecObj, else number of spectroscopic line (SpecLine) or index (SpecLineIndex) or redshift (ELRedhsift or XCRedshift)
- DR8 and after
- 50-63 plate id number (14 bits)
- 38-49 fiber id number (12 bits)
- 24-37 MJD (date) plate was observed minus 50000 (14 bits)
- 10-23 rerun (14 bits)
- 0-9 line/redshift/index: 0 for SpecObj, else number of spectroscopic line (SpecLine) or index (SpecLineIndex) (10 bits)
- SpecobjID和plate,mjd,fiberID的互转参考[[sdssidl][中的程序[1]